Add a use message

Adding a helpful use message to your application lets people receive an instant online reminder
for command-line arguments and basic usage simply by typing
useapp_name.

Usage messages are plain text files, typically named
app_name.use, which are located in the root of your
application's project directory. For example, if you had the nodetime
project open, its usage message might be in nodetime.use. This convention
lets the recursive Makefile system automatically find your usage message
data.

For information about writing usage messages, see usemsg in the Utilities Reference.